import {z} from 'zod'

export type PythonVersion = '3.12' | '3.13' | '3.14';

export type Environment = {python_version?: PythonVersion | undefined, pypi_dependencies?: Array<string> | undefined, environment_variables?: {[key: string]: string} | undefined};

export type Resources = {cpu?: (number | null) | undefined, memory_mib?: (number | null) | undefined, gpu?: (string | null) | undefined, timeout_seconds?: number | undefined};

export type SerializableValue = {module: string, qualname: string, serialized_value: string, kind?: 'serialized' | undefined};

export type JsonValue = unknown;

export type LiteralValue = {kind?: 'literal' | undefined, value: JsonValue};

export type ExecutionValue = SerializableValue | LiteralValue;

export type ExecutionArguments = {positional?: Array<ExecutionValue> | undefined, keyword?: {[key: string]: ExecutionValue} | undefined};

export type ExecutionRequest = {serialized_function: string, serialization_python_version: PythonVersion, environment: Environment, resources?: Resources | undefined, arguments?: ExecutionArguments | undefined};

export type CreateApiV1ExecutionJobsArgs = {body: ExecutionRequest};

export type CreateApiV1ExecutionJobsOptions = {baseUrl: string, BearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const iD = z.union([z.string(), z.string()]);

export const jobStatus = z.enum(["pending", "running", "completed", "failed", "cancelled"]);

export const jobSubmissionResponse = z.object({job_id: iD, status: jobStatus, message: z.string()});

export const validateResponse = async <Output>(
  schema: {
    readonly '~standard': {
      readonly validate: (value: unknown) => ({ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }) | Promise<{ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }>
    }
  },
  value: unknown
): Promise<Output> => {
  const result = await schema['~standard'].validate(value)

  if (result.issues !== undefined) {
    const detail = result.issues
      .map(({ message, path }) =>
        path?.length
          ? `${path.map((segment) => String(typeof segment === 'object' ? segment.key : segment)).join('.')}: ${message}`
          : message
      )
      .join('; ')

    throw new Error(`Response does not match the schema: ${detail}`, { cause: { issues: result.issues } })
  }

  return result.value
};

/**
 * Create Execution Job
 * 
 * POST /v1/execution_jobs
 */
export const createApiV1ExecutionJobs = async (args: CreateApiV1ExecutionJobsArgs, options: CreateApiV1ExecutionJobsOptions) => {
const {baseUrl, fetch: fetchFn = fetch, BearerAuth} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('content-type', "application/json")
headers.set('accept', "application/json")

if (BearerAuth !== undefined) headers.set('authorization', `Bearer ${BearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/execution_jobs${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(jobSubmissionResponse, await res.json())
};